Welcome
A few things to think about now are:
Your upcoming PDI (delivery inspection) there are numerous posts on here, check-lists, etc to help prepare you for your big day.
Must have items you'll need to buy...
Sewer hose kit
Fresh water hose
blocks for under your jack, and under your corner jacks.
Typical kitchen stuff... paper plates, etc.. Electrical management system (EMS). The list could be 5 pages long if we get into on this thread, I'd definitely start researching things you'll need to buy. Amazon has almost everything.
It's going to end up being a large list. But you can start small and decide what you need based on what you want after your first couple trips.
There's like a decade of information here you can find from the search engine, but feel free to ask for any specific advise, if there's anything you are concerned about, regarding towing your new camper, etc.